West Elm describes as: Prized for its breathability, our Belgian flax linen keeps you cool in the summer and warm in the winter, making it a dreamy choice for the master bedroom. In cool asphalt, graduated stripes add a bit of verve to the crisp white base. Made in a Fair Trade Certified facility, our linen is crisp with a natural texture that softens with every wash. 100% Belgian flax in White / Asphalt. Oeko-Tex Certified: tested in a third-party lab and verified to be free from over 300 harmful substances. Duvet Cover: Button closure; four interior corner ties keep it in place. Shams: Envelope closure. Shams sold separately individually. Striped print on front; solid on reverse. Made in a Fair Trade Certified facility. Linen woven from Belgian flax, constructed in China.